8MM NAUTILUS V2 GEARBOX FOR KRYTAC SERIES w/KRYTAC 30K TORQUE MOTOR (LONG)DROP IN KIT: Features Factory direct complete OEM replacement gearbox Built in MOSFET unit regulates battery current to protect the trigger contacts Padded cylinder head helps soften and absorb some of the transferred shock Reinforced piston to withstand the high cyclic rate of the Nautilus Gearbox Easy spring change allows the spring to be swapped out without disassembly of the gearbox Version: 2Compatibility: Krytac series airsoft AEG rifles (May